Cita APA

Duffett-Smith, P. (1988). Practical astronomy with your calculator (3rd ed.). cambridge, N.Y.: Cambridge University Press.

Citación estilo Chicago

Duffett-Smith, Peter. Practical Astronomy With Your Calculator. 3rd ed. cambridge, N.Y.: Cambridge University Press, 1988.

Cita MLA

Duffett-Smith, Peter. Practical Astronomy With Your Calculator. 3rd ed. cambridge, N.Y.: Cambridge University Press, 1988.